WO2015078027A1 - 彩色液晶显示面板 - Google Patents

彩色液晶显示面板 Download PDF

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Publication number
WO2015078027A1
WO2015078027A1 PCT/CN2013/088360 CN2013088360W WO2015078027A1 WO 2015078027 A1 WO2015078027 A1 WO 2015078027A1 CN 2013088360 W CN2013088360 W CN 2013088360W WO 2015078027 A1 WO2015078027 A1 WO 2015078027A1
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WIPO (PCT)
Prior art keywords
liquid crystal
dichroic dye
substrate
layer
thin film
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PCT/CN2013/088360
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English (en)
French (fr)
Inventor
钟新辉
Original Assignee
深圳市华星光电技术有限公司
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Priority to US14/236,709 priority Critical patent/US9395579B2/en
Publication of WO2015078027A1 publication Critical patent/WO2015078027A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13475—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which at least one liquid crystal cell or layer is doped with a pleochroic dye, e.g. GH-LC cell
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured light
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/58—Dopants or charge transfer agents
    • C09K19/586—Optically active dopants; chiral dopants
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/60—Pleochroic dyes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136286—Wiring, e.g. gate line, drain line
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
    • G02F1/1396—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133302—Rigid substrates, e.g. inorganic substrates
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133357—Planarisation layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00—Function characteristic
    • G02F2203/34—Colour display without the use of colour mosaic filters

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular, to a color liquid crystal display panel. Background technique
  • Liquid crystal display has many advantages such as thin body, power saving, and no radiation, and has been widely used.
  • Most of the liquid crystal display devices on the market are backlight type liquid crystal display devices, which include a liquid crystal display panel and a backlight module.
  • the working principle of the liquid crystal display panel is to place liquid crystal molecules in two parallel glass substrates, and control the liquid crystal molecules to change direction by applying a driving voltage on the two glass substrates, and refract the light of the backlight module to produce a picture flick
  • a liquid crystal display panel comprises a color filter film (CF, Color Filter) substrate, a thin film transistor (TFT, Tbin Film Transistor) substrate, and a liquid crystal (LC, Liquid Crystal) material sandwiched between the color filter film substrate and the thin film transistor substrate.
  • the sealant composition the molding process generally includes: front array (Array) process (film, yellow, etching and stripping), middle box (Ceii) process (thin film transistor substrate and color filter substrate Fit) and rear module assembly process (drive circuit (IC) is pressed with printed circuit board).
  • the front-end array (Array) process mainly forms a thin film transistor substrate to facilitate control of movement of liquid crystal molecules;
  • the middle-stage cassette (Ce) process mainly adds liquid crystal between the thin film transistor substrate and the color filter film substrate;
  • the assembly process is mainly the integration of the driver circuit and the printed circuit board, thereby driving the liquid crystal molecules to rotate and displaying images.
  • FIG. 1 it is a schematic structural diagram of a conventional TN liquid crystal display panel.
  • the existing TN liquid crystal display panel mainly includes an upper polarizer 100 , a color filter film substrate 110 , and a dye liquid crystal layer which are arranged in a layered structure from top to bottom. 120.
  • the thin film transistor substrate 130 and the lower polarizer 140 are stacked on top of each other to form a display panel.
  • the color filter on the color filter film substrate can only pass light in a part of the band, and the light is polarized by the polarizer, so the light intensity after passing through the color filter is reduced to about 33%. This is one of the reasons for the low efficiency of LCD light. At the same time, due to the need to set polarizers and color filters, it is not conducive to the control of production costs. Summary of the invention
  • the color filter reduces the manufacturing cost of the liquid crystal display panel and the brightness of the backlight, and improves the light transmittance and the light efficiency.
  • the present invention provides a color liquid crystal display panel, comprising: a plurality of liquid crystal cells arranged in parallel with each other; and bonding firmware for bonding the plurality of liquid crystal cells, each of the liquid crystal cells including a film a transistor substrate, a package substrate, and a dye liquid crystal layer sealed between the thin film transistor substrate and the package substrate, the dye liquid crystal layer comprising a liquid crystal material, a dichroic dye, and a chiral reagent, in each of the liquid crystal cells
  • the dichroic dye absorbs light of a predetermined wavelength range
  • the plurality of liquid crystal cells respectively absorb light of different wavelength ranges.
  • the liquid crystal has a positive nematic liquid crystal; the bonding firmware is a transparent glue or a double-sided tape.
  • the thin film transistor substrate includes a first transparent substrate, a plurality of *polar lines formed on the first transparent substrate, and a plurality of data lines formed on the first transparent substrate, formed in the first transparent a thin film transistor array on the substrate, a plurality of pixel electrodes formed on the thin film transistor array, a first planarization layer formed on the pixel electrode and the thin film transistor array, and a first planarization layer formed on the first planarization layer First alignment layer.
  • the first transparent substrate is a glass substrate
  • the pixel electrode is made of indium tin oxide
  • the first alignment layer is a horizontal alignment layer.
  • the package substrate includes a second transparent substrate, a black matrix formed on the second transparent substrate, a second planarization layer formed on the second transparent substrate and the black matrix, and formed on the second flat a common electrode on the layer, a second alignment layer formed on the common electrode, and a photoresist material layer formed on the second alignment layer, the black matrix, the gate line, the data line, and the thin film transistor array
  • the color liquid crystal display panel is divided into a plurality of pixels by mutual cooperation.
  • the second transparent substrate is a glass substrate
  • the common electrode is made of indium tin oxide
  • the second alignment layer is a horizontal alignment layer.
  • the liquid crystal material contains liquid crystal molecules, and an alignment direction of the first alignment layer forms an angle with an alignment direction of the second alignment layer, so that liquid crystal molecules are formed without a driving voltage.
  • the nematic array is twisted and arranged, the angle is greater than 0° and less than 180°, and the twist angle of the liquid crystal molecules is greater than or equal to 90. , and less than 180. .
  • the liquid crystal material contains liquid crystal molecules, the dichroic dye contains dichroic dye molecules, and the dichroic dye molecules have a molecular structure similar to the molecular structure of the liquid crystal molecules; the dichroic dye The molecule has selective absorption of visible light; when the visible light travel direction is parallel to the long axis of the dichroic dye molecule, the dichroic dye molecules do not absorb visible light, when the visible light travels direction and the dichroic dye molecules When the long axis is vertical, the dichroic dye molecules have an absorption effect on the visible light.
  • the liquid crystal molecules When no driving voltage is applied to the thin film transistor substrate and the package substrate, the liquid crystal molecules form a nematic twist structure with the dichroic dye molecules, and the liquid crystal molecules and the dichroic dye molecules have multi-directional twist Arranging angle, the dichroic dye molecules have an absorption effect on visible light; when a driving voltage is applied to the thin film transistor substrate and package, the liquid crystal molecules and the dichroic dye molecules are rotated perpendicular to the film The dichroic dye molecule has no absorption effect on visible light on the transistor substrate or the package surface
  • the number of layers of the liquid crystal cell is three layers, which are first to third liquid crystal cells, respectively, the dichroic dye in the first liquid crystal cell absorbs red wavelength light, and the second layer liquid crystal cell The dichroic dye in the medium absorbs light of a green wavelength, and the dichroic dye in the third layer liquid crystal cell absorbs light of a blue wavelength.
  • the present invention also provides a color liquid crystal display panel, comprising: a plurality of liquid crystal cells arranged in parallel with each other and a bonding firmware for bonding the plurality of liquid crystal cells, each of the liquid crystal cells comprising a thin film transistor substrate, a package substrate and a dye liquid crystal layer sealed between the thin film transistor substrate and the package substrate, the dye liquid crystal layer comprising a liquid crystal material, a dichroic dye and a chiral agent, and a dichroic dye in each of the liquid crystal cells Absorbing light of a predetermined wavelength range, wherein the plurality of liquid crystal cells respectively absorb light of different wavelength ranges;
  • the liquid crystal material has a positive nematic liquid crystal material
  • the bonding firmware is an optical transparent glue or a double-sided tape
  • the thin film transistor substrate includes a first transparent substrate, a plurality of gate lines formed on the first transparent substrate, and a plurality of data lines formed on the first transparent substrate, and are formed in the first a thin film transistor array on a transparent substrate, a plurality of pixel electrodes formed on the thin film transistor array, a first planarization layer formed on the pixel electrode and the thin film transistor array, and a first planarization layer formed on the first planarization layer First alignment layer
  • the first transparent substrate is a glass substrate, the pixel electrode is made of indium tin oxide, and the first alignment layer is a horizontal alignment layer;
  • the package substrate includes a second transparent substrate and is formed on the second transparent substrate. a black matrix on the second, a second planarization layer formed on the second transparent substrate and the black matrix, a common electrode formed on the second planarization layer, and a second alignment layer formed on the common electrode And a photoresist layer formed on the second alignment layer, wherein the black matrix, the *-pole line, the data line, and the thin film transistor array cooperate to divide the color liquid crystal display panel into a plurality of pixels;
  • the second transparent substrate is a glass substrate
  • the common electrode is made of indium tin oxide
  • the second alignment layer is a horizontal alignment layer.
  • the liquid crystal material contains liquid crystal molecules, and an alignment direction of the first alignment layer forms an angle with an alignment direction of the second alignment layer, so that liquid crystal molecules form a nematic twist structure without a driving voltage.
  • the angle is greater than zero. And less than 180.
  • the liquid crystal molecules have a twist angle greater than or equal to 90. , and less than 80. .
  • the liquid crystal material contains liquid crystal molecules, the dichroic dye contains a dichroic dye molecule, and the dichroic dye molecule has a molecular structure similar to the molecular structure of the liquid crystal molecule;
  • the dye molecules have selective absorption of visible light; when the direction of visible light travel is parallel to the long axis of the dichroic dye molecule, the dichroic dye molecules do not absorb visible light, when the visible light travels direction and the dichroic dye When the long axis of the molecule is vertical, the dichroic dye molecules have an absorption effect on the visible light.
  • the liquid crystal molecules When no driving voltage is applied to the thin film transistor substrate and the package substrate, the liquid crystal molecules form a nematic twist structure with the dichroic dye molecules, and the liquid crystal molecules and the dichroic dye molecules have multi-directional twist Arranging angle, the dichroic dye molecules have an absorption effect on visible light; when a driving voltage is applied to the thin film transistor substrate and the package substrate, the liquid crystal molecules and the dichroic dye molecules are rotated to be perpendicular to the On the surface of the thin film transistor substrate or the package substrate, the dichroic dye molecules have no absorption effect on visible light.
  • the number of layers of the liquid crystal cell is three layers, which are first to third liquid crystal cells, respectively, the dichroic dye in the first liquid crystal cell absorbs red wavelength light, and the second layer liquid crystal cell The dichroic dye in the light absorbs light of a green wavelength, and the dichroic dye in the third layer liquid crystal cell absorbs light of a blue wavelength
  • the color liquid crystal display panel of the present invention adds a dichroic dye having a specific absorption spectrum to a liquid crystal material to form a dye liquid crystal layer capable of absorbing light of a predetermined wavelength range, and performs light emission from the backlight.
  • a dichroic dye having a specific absorption spectrum to a liquid crystal material to form a dye liquid crystal layer capable of absorbing light of a predetermined wavelength range, and performs light emission from the backlight.
  • Selective absorption thereby providing color display, and color display by stacking a plurality of liquid crystal layers absorbing light of different wavelength ranges, that is, color display can be realized without using polarizers and color filters in the prior art, thereby reducing
  • the manufacturing cost of the liquid crystal display panel and the requirements for the brightness of the backlight improve the light transmittance and the light efficiency.
  • FIG. 1 is a schematic structural view of a conventional TN type liquid crystal display panel
  • FIG. 2 is a schematic structural view of a color liquid crystal display panel of the present invention.
  • Figure 3 is a schematic structural view of the liquid crystal cell of Figure 2;
  • FIG. 4 is a top plan view of the thin film transistor substrate of FIG. 3;
  • Figure 5 is a plan view of the package base plate of Figure 3.
  • FIG. 6 and FIG. 7 are schematic diagrams showing a single color display principle of a color liquid crystal display panel according to the present invention
  • FIG. 8 to FIG. 12 are schematic diagrams showing color principle of a color liquid crystal display panel according to a preferred embodiment of the present invention
  • Figure 13 is a schematic diagram of the principle of color subtraction. Specific travel mode
  • the present invention provides a color liquid crystal display panel, comprising: a plurality of liquid crystal cells 2 disposed in parallel with each other; and a bonding firmware 8 for bonding the plurality of liquid crystal cells 2;
  • the liquid crystal cell 2 is a TN type liquid crystal cell, and each of the liquid crystal cells 2 includes a thin film transistor substrate 20, a package substrate 30, and a dye liquid crystal layer 40 sealed between the thin film transistor substrate 20 and the package substrate 30.
  • the dye liquid crystal layer 40 includes a liquid crystal material, a dichroic dye, and a chiral agent.
  • the dichroic dye in each of the liquid crystal cells 2 absorbs light of a predetermined wavelength range, and the plurality of liquid crystal cells 2 respectively absorb different wavelengths. The range of light.
  • the liquid crystal material has a positive nematic liquid crystal material, and a chiral agent is added to the liquid crystal material, which is beneficial to increase the elastic potential energy of the liquid crystal molecules 42 in the liquid crystal material, and is favorable for the deflection of the liquid crystal molecules 42, as shown in FIG.
  • the dichroic dye is capable of absorbing light of a predetermined wavelength range.
  • the bonding firmware 8 can be an optically clear glue. Double-sided tape or other transparent bonding firmware.
  • the thin film transistor substrate 20 includes a first transparent substrate 21 , a plurality of gate lines 22 formed on the first transparent substrate 21 , and a first transparent substrate 21 .
  • a plurality of upper data lines 23 an array of thin film transistors 24 formed on the first transparent substrate 21, a plurality of pixel electrodes 26 formed on the array of the thin film transistors 24, and the pixel electrodes 26 and thin film transistors.
  • the first transparent substrate 21 may be a glass substrate or a plastic substrate, and is a glass substrate in this embodiment.
  • the thin film transistor 24 has a gate, a source and a drain.
  • the gate of the thin film transistor 24 is electrically connected to the tree line 22, and the source of the thin film transistor 24 and the data are
  • the drain of the thin film transistor 24 is electrically connected to the pixel electrode 26 .
  • the pixel electrode 26 is preferably made of indium tin oxide.
  • the first alignment layer 28 is a horizontal alignment layer.
  • the package substrate 30 includes a second transparent substrate 31, a plurality of black matrices 32 formed on the second transparent substrate 31, and the second transparent substrate 31 and the black substrate. a second planarization layer 37 on the matrix 32, a common electrode 36 formed on the second planarization layer 37, a second alignment layer 38 formed on the common electrode 36, and a second alignment layer formed on the second alignment layer 37.
  • the photoresist layer 33 on the 38, the black matrix 32, the gate line 22, the data line 23, and the thin film transistor 24 array cooperate to divide the color liquid crystal display panel into a plurality of pixels.
  • the second transparent substrate 31 may be The glass substrate or the plastic substrate is a glass substrate in this embodiment.
  • the black matrix (Black: Matrix) 32 is used to shield the light so that the position where the light is not transmitted is black.
  • the common electrode 36 is preferably made of indium tin oxide.
  • the second alignment layer 38 is a horizontal alignment layer.
  • the alignment direction of the second alignment layer 38 forms an angle with the alignment direction of the first alignment layer 28, the angle is greater than 0° and less than 180°, and the second alignment layer 38 and the first alignment layer 28 make liquid crystal molecules And the dichroic dye molecules form a nematic twist structure in an initial state, and the angle of twist is greater than or equal to 90. That is, when no driving voltage is applied to the thin film transistor substrate 20 and the package substrate 30, both the liquid crystal molecules 42 and the dichroic dye molecules 44 are 90. Or twist angles above 90° are twisted and arranged in multiple directions, as shown in Figure 6.
  • the photo-resist layer 33 is used to store the thin film transistor substrate 20 and the package substrate 30 at a distance so as to be located in the dye liquid crystal layer 40 between the thin film transistor substrate 20 and the package substrate 30.
  • the molecular distribution is hooked to prevent blurring of the displayed image due to uneven thickness of the liquid crystal.
  • a single color display principle of the color liquid crystal display panel of the present invention is obtained by dissolving a certain amount of a dichromatic dye in a liquid crystal material.
  • the liquid crystal material contains liquid crystal molecules 42 containing a dichroic dye molecule 44 having a molecular structure similar to that of the liquid crystal molecules 42 and the second The color dye molecules 44 have a selective absorption of visible light.
  • the dichroic dye molecule 44 When the direction of visible light travels parallel to the long axis of the dichroic dye molecule 44 When the dichroic dye molecule 44 does not substantially absorb the visible light, when the visible light traveling direction is perpendicular to the long axis of the dichroic dye molecule 44, the dichroic dye molecule 44 strongly absorbs visible light, and therefore, The absorption intensity of the dichroic dye molecules 44 to the backlight can be adjusted by controlling the angle between the dichroic dye molecules 44 and the light emitted by the backlight, thereby adjusting the transmitted light intensity to achieve different gray scales. .
  • the liquid crystal molecules 42 and the dichroic dye molecules 44 have a twist angle of 90 or 90.
  • the above nematic twisted alignment structure has a multi-directional arrangement angle. Since the first alignment layer 28 and the second alignment layer 38 are horizontal alignment layers, the dichroic dye molecules 44 may be perpendicular to the thin film transistor substrate 20 or The light 6 incident on the surface of the package substrate 30 generates absorption, and the unabsorbed light passes through the liquid crystal cell 2. Since the dichroic dye has a specific absorption spectrum, the transmitted light 62 can be colored to a specific color. Color display.
  • the absorption spectrum is also different, and the color of the transmitted light entering the human eye is different, so that a plurality of different dichroic dyes can be selected, and different dye liquid crystal layers can be mixed. After 40 liquid crystal materials, the purpose of displaying different colors is achieved.
  • the liquid crystal molecules 42 and the dichroic dye molecules 44 are rotated by an electric field, and finally will be perpendicular to the film.
  • the surface of the transistor substrate 20 or the package J ⁇ plate 30 is arranged. Since the liquid crystal molecules 42 do not substantially absorb visible light, the long axis of the dichroic dye molecules 44 is parallel to the direction of light traveled by the backlight (not shown). Therefore, the dichroic dye molecules 44 do not substantially absorb the light 61 emitted from the backlight. Therefore, in the case where the driving voltage is applied to the thin film transistor substrate 20 and the package substrate 30, most of the light 61 emitted from the backlight is Through the liquid crystal display panel, the entire liquid crystal display panel is in a bright state.
  • the color liquid crystal display panel is a TN type liquid crystal display panel.
  • the color liquid crystal display panel comprises a three-layer liquid crystal cell, which are first to third liquid crystal cells 3, 4, 5 respectively, and the dichroic dye in the first layer liquid crystal cell 3 absorbs red wavelength.
  • the light of the dichroic dye in the second layer liquid crystal cell 4 absorbs light of a green wavelength, and the dichroic dye in the liquid crystal cell of the third layer absorbs light of a blue wavelength.
  • magenta magenta
  • the liquid crystal display panel of the invention can also realize multi-color display by using the principle of color subtraction, thereby realizing color display.
  • the principle of color subtraction is shown in Figure 13.
  • a driving voltage may be selectively applied between the two substrates of the first layer liquid crystal cell 3, the second layer liquid crystal cell 4, and the third layer liquid crystal cell 5 to obtain two or more colors.
  • the mixed light is used to realize the color display of the liquid crystal display panel.
  • the color liquid crystal display panel of the present invention adds a dichroic dye having a specific absorption spectrum to the liquid crystal material to form a dye liquid crystal layer capable of absorbing light of a predetermined wavelength range, and performs light emission from the backlight.
  • a dichroic dye having a specific absorption spectrum to the liquid crystal material to form a dye liquid crystal layer capable of absorbing light of a predetermined wavelength range, and performs light emission from the backlight.
  • Selective absorption thereby providing color display, and color display by stacking a plurality of liquid crystal layers absorbing light of different wavelength ranges, that is, color display can be realized without using polarizers and color filters in the prior art, thereby reducing
  • the manufacturing cost of the liquid crystal display panel and the requirements for the brightness of the backlight improve the light transmittance and the light efficiency.

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Abstract

一种彩色液晶显示面板，包括：相互平行设置的数层液晶盒（2）及用于粘接数层液晶盒（2）的粘接固件（8），每一液晶盒（2）包括一薄膜晶体管基板（20）、一封装基板（30）及密封于薄膜晶体管基板（20）与封装基板（30）之间的染料液晶层（40），染料液晶层（40）包括液晶材料、二色性染料及手性试剂，每一液晶盒（2）中的二色性染料吸收一预定波长范围的光，数层液晶盒（2）分别吸收不同波长范围的光。该彩色液晶显示面板，不需要偏光片和彩色滤光片就可实现彩色显示，降低了液晶显示面板的制造成本以及对背光亮度的要求，提高光穿透率及光效率。

Description

彩色液晶显示面板
本发明涉及液晶显示技术领域， 尤其涉及一种彩色液晶显示面板。 背景技术
液晶显示装置 ( LCD, Liquid Crystal Display )具有机身薄、 省电, 无 辐射等众多优点， 得到了广泛的应用。 现有巿场上的液晶显示装置大部分 为背光型液晶显示装置， 其包括液晶显示面板及背光模组 （backlight module ) 。 液晶显示面板的工作原理是在两片平行的玻璃基板当中放置液 晶分子， 通过在两片玻璃基板上施加驱动电压来控制液晶分子改变方向， 将背光模组的光线折射出来产生画面„
通常液晶显示面板由彩色滤光膜（CF， Color Filter )基板、 薄膜晶体 管 （TFT , Tbin Film Transistor)基板、 夹于彩色滤光膜基板与薄膜晶体管基 板之间的液晶 ( LC, Liquid Crystal )材料及密封胶框 ( Sealant )组成， 其 成型工艺一般包括： 前段阵列 （Array ) 制程 （薄膜、 黄光、 蚀刻及剥 膜） 、 中段成盒（Ceii ) 制程 （薄膜晶体管基板与彩色滤光膜基板贴合） 及后段模组组装制程（驱动电路（IC ) 与印刷电路板压合） 。 其中， 前段 阵列 （Array )制程主要是形成薄膜晶体管基板， 以便于控制液晶分子的运 动； 中段成盒（Ce ) 制程主要是在薄膜晶体管基板与彩色滤光膜基板之 间添加液晶； 后段模组组装制程主要是驱动电路压合与印刷电路板的整 合， 进而驱动液晶分子转动， 显示图像。
就目前主流市场上的液晶显示面板而言， 可分为三大类， 分别是 TN (扭曲向列 ) ,/STN (超级扭曲向列 ) ， IPS (板内切换） /FFS (边缘切 换）及 VA (垂直配向）型， 其中， TN型液晶显示面板具有液晶分子偏转 速度快、 响应速度高等优点， 是应用最广泛的入门级液晶显示面板之一。 参见图 1， 其为现有 TN型液晶显示面板的结构示意图， 现有的 TN型液 晶显示面板主要包括由上至下分层配置的上偏光片 100、 彩色滤光膜基板 110、 染料液晶层 120、 薄膜晶体管基板 130, 及下偏光片 140, 各层由上 至下 序层叠在.一起组成显示面板。
为实现全彩显示， 通常釆用在液晶显示面板的一片玻璃 （通常为与薄 膜晶体管基板玻璃相对设置的上玻璃， 也可以为薄膜晶体管基板玻璃） 上 通过涂布、 曝光、 显影的办法制成彩色滤光膜基板， 利用空间混色原理， 实现全彩显示。
但是彩色滤光膜基板上的彩色滤光片只可以让部分波段的光线通过， 且需要借助偏光片的对光线进行偏振， 所以通过彩色滤光片之后的光强会 衰减为原来的约 33%， 这是目前 LCD 光效率较低的原因之一， 同时， 由 于需要设置偏光片与彩色滤光片， 不利于生产成本的管控。 发明内容
本发明的目的在于提供一种彩色液晶显示面板， 通过在液晶材料中加 入二色性染料， 利用二色性染料吸收部分颜色的光， 进而实现彩色显示， 不需要设置现有技术中的偏光片和彩色滤光片， 降低了液晶显示面板的制 造成本以及对背光亮度的要求， 提高光穿透率及光效率。
为实现上述目的， 本发明提供一种彩色液晶显示面板， 包括： 相互平 行设置的数层液晶盒及用于粘接所述数层液晶盒的粘接固件， 每一所述液 晶盒包括一薄膜晶体管基板、 一封装基板及密封于所述薄膜晶体管基板与 封装基板之间的染料液晶层， 所述染料液晶层包括液晶材料、 二色性染料 及手性试剂， 每一所述液晶盒中的二色性染料吸收一预定波长范围的光， 所述数层液晶盒分别吸收不同波长范围的光。
所述液晶为具有正性向列液晶； 所述粘接固件为透明胶水或双面胶。 所述薄膜晶体管基板包括一第一透明基板、 形成于所述第一透明基板 上的数根 *极线、 形成于所述第一透明基板上的数根数据线、 形成于所述 第一透明基板上的薄膜晶体管阵列、 形成于所述薄膜晶体管阵列上的数个 像素电极、 形成于所述像素电极及薄膜晶体管阵列上的第一平坦化层及形 成于所述第一平坦化层上的第一配向层。
所述第一透明基板为玻璃基板， 所述像素电极由氧化铟锡制成， 所述 第一配向层为水平配向层。
所述封装基板包括一第二透明基板、 形成于所述第二透明基板上的黑 色矩阵、 形成于所述第二透明基板及黑色矩阵上的第二平坦化层、 形成于 所述第二平坦化层上的公共电极、 形成于所述公共电极上的第二配向层及 形成于所述第二配向层上的光阻材料层， 所述黑色矩阵、 栅极线、 数据线 及薄膜晶体管阵列相互配合将该彩色液晶显示面板划分为数个像素。
所述第二透明基板为玻璃基板， 所述公共电极由氧化铟锡制成， 所述 第二配向层为水平配向层。
所述液晶材料含有液晶分子， 所述第一配向层的配向方向与第二配向 层的配向方向形成一夹角， 以使液晶分子在没有驱动电压作用的情况下形 成向列扭转排列结构， 所述夹角大于 0° 且小于 180° , 所述液晶分子的 扭转角度大于或等于 90。 , 且小于 180。 。
所述液晶材料含有液晶分子， 所述二色性染料含有二色性染料分子， 所述二色性染料分子具有与所述液晶分子的分子结构相类^的分子结构； 所述二色性染料分子对可见光线具有选择性吸收作用； 当可见光线行进方 向与二色性染料分子长軸平行时， 二色性染料分子对可见光线不具有吸收 作用， 当可见光线行进方向与二色性染料分子长轴垂直时， 二色性染料分 子对可见光线具有吸收作用。
当不施加驱动电压于所述薄膜晶体管基板与封装基板时， 所述液晶分 子与所述二色性染料分子形成向列扭转排列结构， 所述液晶分子与二色性 染料分子具有多方向的扭转排列角度， 所述二色性染料分子对可见光线具 有吸收作用； 当施加驱动电压于所述薄膜晶体管基板与封装 时， 所述 液晶分子与所述二色性染料分子旋转至垂直于所述薄膜晶体管基板或所述 封装 表面， 所述二色性染料分子对可见光线不具有吸收作用„
所述数层液晶盒的层数为三层， 分别为第一至第三层液晶盒， 所述第 一层液晶盒中的二色性染料吸收红色波长的光， 所述第二层液晶盒中的二 色性染料吸收绿色波长的光， 所述第三层液晶盒中的二色性染料吸收蓝色 波长的光。
本发明还提供一种彩色液晶显示面板， 包括： 相互平行设置的数层液 晶盒及用于粘接所述数层液晶盒的粘接固件， 每一所述液晶盒包括一薄膜 晶体管基板、 一封装基板及密封于所述薄膜晶体管基板与封装基板之间的 染料液晶层， 所述染料液晶层包括液晶材料、 二色性染料及手性试剂， 每 一所述液晶盒中的二色性染料吸收一预定波长范围的光， 所述数层液晶盒 分别吸收不同波长范围的光；
其中， 所述液晶材料为具有正性向列液晶材料； 所述粘接固件为光学 透明胶水或双面胶；
其中， 所述薄膜晶体管基板包括一第一透明基板、 形成于所述第一透 明基板上的数根櫥极线、 形成于所述第一透明基板上的数根数据线、 形成 于所述第一透明基板上的薄膜晶体管阵列、 形成于所述薄膜晶体管阵列上 的数个像素电极、 形成于所述像素电极及薄膜晶体管阵列上的第一平坦化 层及形成于所述第一平坦化层上的第一配向层；
其中， 所述第一透明基板为玻璃基板， 所述像素电极由氧化铟锡制 成， 所述第一配向层为水平配向层；
其中， 所述封装基板包括一第二透明基板、 形成于所述第二透明基板 上的黑色矩阵、 形成于所述第二透明基板及黑色矩阵上的第二平坦化层、 形成于所述第二平坦化层上的公共电极、 形成于所述公共电极上的第二配 向层及形成于所述第二配向层上的光阻材料层， 所述黑色矩阵、 *极线、 数据线及薄膜晶体管阵列相互配合将该彩色液晶显示面板划分为数个像 素；
其中， 所述第二透明基板为玻璃基板， 所述公共电极由氧化铟锡制 成， 所述第二配向层为水平配向层。
所述液晶材料含有液晶分子， 所述第一配向层的配向方向与第二配向 层的配向方向形成一夹角， 以使液晶分子在没有驱动电压作用的情况下形 成向列扭转排列结构， 所述夹角大于 0。 且小于 180。 ， 所述液晶分子的 扭转角度大于或等于 90。 ， 且小于 80。 。
所述液晶材料含有液晶分子， 所述二色性染料含有二色性染料分子 -, 所述二色性染料分子具有与所述液晶分子的分子结构相类^的分子结构； 所述二色性染料分子对可见光线具有选择性吸收作用； 当可见光线行进方 向与二色性染料分子长轴平行时， 二色性染料分子对可见光线不具有吸收 作用， 当可见光线行进方向与二色性染料分子长轴垂直时， 二色性染料分 子对可见光线具有吸收作用。
当不施加驱动电压于所述薄膜晶体管基板与封装基板时， 所述液晶分 子与所述二色性染料分子形成向列扭转排列结构， 所述液晶分子与二色性 染料分子具有多方向的扭转排列角度， 所述二色性染料分子对可见光线具 有吸收作用； 当施加驱动电压于所述薄膜晶体管基板与封装基板时， 所述 液晶分子与所述二色性染料分子旋转至垂直于所述薄膜晶体管基板或所述 封装基板表面， 所述二色性染料分子对可见光线不具有吸收作用。
所述数层液晶盒的层数为三层， 分别为第一至第三层液晶盒， 所述第 一层液晶盒中的二色性染料吸收红色波长的光， 所述第二层液晶盒中的二 色性染料吸收绿色波长的光， 所述第三层液晶盒中的二色性染料吸收蓝色 波长的光
本发明有益效果： 本发明的彩色液晶显示面板， 将具有特定吸收光谱 的二色性染料加入至液晶材料中， 以形成可吸收预定波长范围的光的染料 液晶层， 对背光源发出的光线进行选择性吸收， 从而提供色彩显示， 并通 过堆叠多层吸收不同波长范围的光的液晶层来实现彩色显示， 即不需要现 有技术中的偏光片和彩色滤光片就可实现彩色显示， 降低了液晶显示面板 的制造成本以及对背光亮度的要求， 提高光穿透率及光效率。 附图说明
下面结合附图， 通过对本发明的具体实施方式详细描述， 将使本发明 的技术方案及其他有益效果显而易见。
附图中，
图 1为现有 TN型液晶显示面板的结构示意图；
图 2为本发明彩色液晶显示面板的结构示意图；
图 3为图 2中液晶盒的结构示意图；
图 4为图 3中薄膜晶体管基板的俯视图；
图 5为图 3中封装基.板的俯视图；
图 6及图 7为本发明彩色液晶显示面板单一颜色显示原理示意图； 图 8 至图 12 为本发明彩色液晶显示面板一较佳实施例的颜色显示原 理示意图；
图 13为色彩减法原理示意图。 具体实旅方式
请参阅图 2 至图 5， 本发明提供一种彩色液晶显示面板， 包括： 相互 平行设置的数层液晶盒 2及用于粘接所述数层液晶盒 2的粘接固件 8; 所 述数层液晶盒 2为 TN型液晶盒， 每一所述液晶盒 2包括一薄膜晶体管基 板 20、 一封装基板 30及密封于所述薄膜晶体管基板 20与封装基板 30之 间的染料液晶层 40， 所述染料液晶层 40 包括液晶材料、 二色性染料及手 性试剂， 每一所述液晶盒 2 中的二色性染料吸收一预定波长范围的光， 所 述数层液晶盒 2分别吸收不同波长范围的光。
所述液晶材料为具有正性向列液晶材料， 在液晶材料中加入手性试 剂， 有利于增加液晶材料中液晶分子 42 的弹性势能， 有利于液晶分子 42 的偏转， 如图 6所示。 所述二色性染料能吸收预定波长范围的光线。 所述 粘接固件 8可为光学透明胶水。 双面胶或其他透明粘接固件。
如图 3 及图 4 所示， 所述薄膜晶体管基板 20 包括一第一透明基板 21、 形成于所述第一透明基板 21 上的数根棚极线 22、 形成于所述第一透 明基板 21上的数根数据线 23、 形成于所述第一透明基板 21上的薄膜晶体 管 24阵列、 形成于所述薄膜晶体管 24阵列上的数个像素电极 26、 形成于 所述像素电极 26及薄膜晶体管 24阵列上的第一平坦化层 27及形成于所 述第一平坦化层 27上的第一配向层 28。
所述第一透明基板 21 可以为玻璃基板或塑料基板， 本实施例中为玻 璃基板。 所述薄膜晶体管 24 具有一栅极、 一源极及一漏极， 所述薄膜晶体管 24的栅极与所述树极线 22电性连接， 所述薄膜晶体管 24的源极与所述.数 据线 23 电性连.接， 所述薄膜晶体管 24的漏极与所述像素电极 26电性连 接。 所述像素电极 26优选为由氧化铟锡制成。 所述第一配向层 28为水平 配向层。
如图 3及图 5所示， 所述封装基板 30包括一第二透明基板 31、 形成 于所述第二透明基板 31 上的数个黑色矩阵 32、 形成于所述第二透明基板 31 与黑色矩阵 32上的第二平坦化层 37、 形成于所述第二平坦化层 37上 的公共电极 36. 形成于所述公共电极 36上的第二配向层 38及形成于所述 第二配向层 38上的光阻材料层 33 , 所述黑色矩阵 32、 柵极线 22、 数据线 23 及薄膜晶体管 24 阵列相互配合将该彩色液晶显示面板划分为数个像 士 所述第二透明基板 31 可以为玻璃基板或塑料基板， 本实施例中为玻 璃基板.。
所述黑色矩阵（Black: Matrix ) 32 用于遮.光， 使不该透光的位置为黑
。
所述公共电极 36优选为由氧化铟锡制成。
所述第二配向层 38为水平配向层。 所述第二配向层 38的配向方向与 第一配向层 28的配向方向形成一夹角， 所述夹角大于 0° 且小于 180° ， 第二配向层 38与第一配向层 28使液晶分子和二色性染料分子在初始状态 时形成向列扭转排列结构， 扭转的角度大于或等于 90。 ， 即在不施加驱动 电压于所述薄膜晶体管基板 20与封装基板 30时， 液晶分子 42和二色性 染料分子 44均呈 90。 或 90° 以上的扭转角度扭转排列， 并具有多方向的 排列角度， 如图 6所述。
所述光阻材料层 （ Photo Spacer ) 33用于使所述薄膜晶体管基板 20与 封装基板 30保存一定距离， 从而使位于所述薄膜晶体管基板 20与封装基 板 30之间的染料液晶层 40中的分子分布均勾， 防止因液晶厚度不均造成 显示影像模糊。
请参阅图 6 至图 7 , 为本发明彩色液晶显示面板的单一颜色显示原 理， 所述染料液晶层 40 由将一定量的二色性染料（Didirok dye )溶解于 液晶材料中得到， 因此， 所述液晶材料含有液晶分子 42， 所述二色性染料 含有二色性染料分子 44， 所述二色性染料分子 44具有与所述液晶分子 42 的分子结构相类似的分子结构， 且所述二色性染料分子 44 对可见光线具 有选择性吸收作用。 当可见光线行进方向与二色性染料分子 44 长轴平行 时， 二色性染料分子 44 对可见光线基本不产生吸收作用， 当可见光线行 进方向与二色性染料分子 44长轴垂直时， 二色性染料分子 44对可见光线 产生强烈吸收作用， 因此， 可以通过控制二色性染料分子 44 与背光源发 出光线的夹角来调节二色性染料分子 44 对背光源发出光线的吸收强度， 起到调节透射光强的作用， 实现显示不同灰阶的目的。
如图 6 所示， 当不施加驱动电压于所述薄膜晶体管基板 20 与封装基 板 30时， 所述液晶分子 42与所述二色性染料分子 44呈扭转角度为 90° 或 90。 以上的向列扭转排列结构， 并具有多方向的排列角度， 由于第一配 向层 28和第二配向层 38均为水平配向层， 所以二色性染料分子 44可以 对垂直于薄膜晶体管基板 20或封装基板 30表面入射的光线 6 产生吸收 作用， 未被吸收的光线則透过所述液晶盒 2， 由于二色性染料具有特定的 吸收光谱， 因此可使透射光线 62 产生特定的颜色， 从而形成色彩显示。 进而， 在液晶材料中添加不同的二色性染料， 其吸收光谱也不同， 进入人 眼的透射光的颜色也就不同， 由此可以选用多种不同的二色性染料， 混合 不同染料液晶层 40的液晶材料之后， 实现显示不同颜色的目的。
如图 7 所示， 当施加驱动电压于所述薄膜晶体管基板 20 与封装基板 30时， 在电场作用下所述液晶分子 42与二色性染料分子 44发生旋转， 并 最终将垂直于所述薄膜晶体管基板 20或所述.封装 J ^板 30表面排列， 由于 液晶分子 42对可见光基本不吸收， 而二色性染料分子 44的长轴与背光源 (未图示）发出的光线行进方向平行， 因此二色性染料分子 44 对背光源 发出的光线 61 也基本不产生吸收， 所以， 在施加驱动电压于所述薄膜晶 体管基板 20与封装基板 30的情况下， 背光源发出的光线 61 大部分都能 透过液晶显示面板， 整个液晶显示面板呈现亮态。
该彩色液晶显示面板为 TN型液晶显示面板。
请参阅图 8至图 12， 为本发明彩色液晶显示面板一具体实施例的颜色 显示原理。 本实施例中， 所述彩色液晶显示面板包括三层液晶盒， 分别为 第一至第三层液晶盒 3、 4、 5， 所述第一层液晶盒 3 中的二色性染料吸收 红色波长的光， 所述第二层液晶盒 4 中的二色性染料吸收绿色波长的光， 所述第三层液晶盒 5中的二色性染料吸收蓝色波长的光。
如图 8所示， 当三层液晶盒的两基板之间均被施加驱动电压时， 即三 层液晶盒均呈 ON状态时， 背光源发出的光线 61 基本都不被吸收， 因而 背光源发出的光线 61 大部分都能透过液晶显示面板， 整个液晶显示面板 王 ί¾ ¾ Ί
如图 9所示， 当仅有第一液晶盒 3的两基板之间未被施加驱动电压， 即仅第一层液晶盒 3呈 OFF状态时， 只有红色光被吸收， 其他颜色光均透 过液晶显示面板， 透过的光线混合形成藏青色 （Cyan )光线 63， 因而仅有 第一层液晶盒 3呈 OFF状态时， 液晶显示面板呈藏青色 （Cyan ) 。
如图 10所示， 当仅有第二层液晶盒 4 的两基板之间未被施加驱动电 压， 即仅第二层液晶盒 4呈 OFF状态时， 只有绿色光被吸收， 其他颜色光 均透过液晶显示面板， 透过的光线混合形成洋红色 ( Magenta )光线 64， 因而仅有第二层液晶盒 4 呈 OFF 状态时， 液晶显示面板呈洋红色 ( Magenta ) 。
如图 11 所示， 当仅有第三层液晶盒 5 的两基板之间未被施加驱动电 压， 即仅第三层液晶盒 5呈 OFF状态时， 只有蓝色光被吸收， 其他颜色光 均透过液晶显示面板， 透过的光线混合形成黄色 （Yellow ) 光线 65， 因而 仅有第三层液晶盒 5呈 OFF状态时， 液晶显示面板呈黄色 （Yellow ) 。
如图 12 所示， 当三层液晶盒的两基板之间均未被施加驱动电压时， 即三层液晶盒均呈 OFF状态时， 红色光、 绿色光及蓝色光均被吸收， 每一 层液晶盒中的二色性染料的吸收光谱均不同， 三种二色性染料的吸收光借 谱叠加之后可以覆盖整个可见光波段， 因而背光源发出的光线 61 大部分 都被吸收， 整个液晶显示面板呈现暗态。
本发明液晶显示面板还可利用色彩减法原理实现多种颜色显示， 进而 实现彩色显示。 色彩减法原理如图 13所示， 当藏青色 71 与洋红色 72混 合后为红色 77 , 当藏青色 7!与黄色 73混合后为绿色 78， 当洋红色 72与 黄色 73混合后为蓝色 79， 当藏青色 71、 洋红色 72及黄色 73三种颜色混 合后为黑色 75。 因此， 本实施 中， 可以选择性地施加驱动电压于所述第 一层液晶盒 3、 第二层液晶盒 4及第三层液晶盒 5的两基板之间， 得到两 种或两种以上颜色混合的光线， 进而实现液晶显示面板的彩色显示。
综上所述， 本发明的彩色液晶显示面板， 将具有特定吸收光谱的二色 性染料加入至液晶材料中， 以形成可吸收预定波长范围的光的染料液晶 层， 对背光源发出的光线进行选择性吸收， 从而提供色彩显示， 并通过堆 叠多层吸收不同波长范围的光的液晶层来实现彩色显示， 即不需要现有技 术中的偏光片和彩色滤光片就可实现彩色显示， 降低了液晶显示面板的制 造成本以及对背光亮度的要求， 提高光穿透率及光效率。
以上所述， 对于本领域的普通技术人员来说， 可以根据本发明的技术 方案和技术构思作出其他各种相应的改变和变形， 而所有这些改变和变形 都应属于本发明后附的权利要求的保护范围。

Claims

权 利 要 求 一种彩色液晶显示面板， 包括： 相互平行设置的数层液晶盒及用 于粘接所述数层液晶盒的粘接固件， 每一所述液晶盒包括一薄膜晶体管基 板 一封装基板及密封于所述薄膜晶体管基板与封装基板之间的染料液晶 层， 所述染料液晶层包括液晶材料、 二色性染料及手性试剂， 每一所述液 晶盒中的二色性染料吸收一预定波长范围的光， 所述数层液晶盒分别吸收 不同波长范围的光。
2、 如权利要求 所述的彩色液晶显示面板， 其中， 所述液晶材料为 具有正性向列液晶材料； 所述粘接固件为光学透明胶水或双面胶。
3、 如权利要求 1 所述的彩色液晶显示面板， 其中， 所述薄膜晶体管 基板包括一第一透明基板、 形成于所述第一透明基板上的数根柵极线、 形 成于所述第一透明基板上的数根数据线、 形成于所述第一透明基板上的薄 膜晶体管阵列.。 形成于所述薄膜晶体管阵列上的数个像素电极、 形成于所 述像素电极及薄膜晶体管阵列上的第一平坦化层及形成于所述第一平坦化 层上的第一配向层。
4、 如权利要求 3 所述的彩色液晶显示面板， 其中， 所述第一透明基 板为玻璃基板， 所述像素电极由氧化铟锡制成， 所述第一配向层为水平配 向层。
5、 如权利要求 3 所述的彩色液晶显示面板， 其中， 所述封装基板包 括一第二透明基板、 形成于所述第二透明基板上的黑色矩阵、 形成于所述 第二透明基板及黑色矩阵上的第二平坦化层、 形成于所述第二平坦化层上 的公共电极， 形成于所述公共电极上的第二配向层及形成于所述第二配向 层上的光阻材料层， 所述黑色矩阵、 栅极线、 数据线及薄膜晶体管阵列相 互配合将该彩色液晶显示面板划分为数个像素。
6、 如权利要求 5 所述的彩色液晶显示面板， 其中， 所述第二透明基 板为玻璃基板， 所述公共电极由氧化铟锡制成， 所述第二配向层为水平配 向层。
7 , 如权利要求 5 所述的彩色液晶显示面板， 其中， 所述液晶材料含 有液晶分子， 所述第一配向层的配向方向与第二配向层的配向方向形成一 夹角， 以使液晶分子在没有驱动电压作用的情况下形成向列扭转排列结 构， 所述夹角大于 0° 且小于 180° ， 所述液晶分子的扭转角度大于或等 于 90。 ， 且小于 180° 。
8 , 如权利要求 1 所述的彩色液晶显示面板， 其中， 所述液晶材料含 有液晶分子， 所述二色性染料含有二色性染料分子， 所述二色性染料分子 具有与所述液晶分子的分子结构相类似的分子结构； 所述二色性染料分子 对可见光线具有选择性吸收作用； 当可见光线行进方向与二色性染料分子 长轴平行时， 二色性染料分子对可见光线不具有吸收作用， 当可见光线行 进方向与二色性染料分子长轴垂直时， 二色性染料分子对可见光线具有吸 收作用。
9 , 如权利要求 8 所述的彩色液晶显示面板， 其中， 当不施加驱动电 压于所述薄膜晶体管基板与封装基板时， 所述液晶分子与所述二色性染料 分子形成向列扭转排列结构， 所述液晶分子与二色性染料分子具有多方向 的扭转排列角度， 所述二色性染料分子对可见光线具有吸收作用； 当施加 驱动电压于所述薄膜晶体管基板与封装基板时， 所述液晶分子与所述二色 性染料分子旋转至垂直于所述薄膜晶体管基板或所述封装基板表面， 所述 二色性染料分子对可见光线不具有吸收作用。
10、 如权利要求 1 所述的彩色液晶显示面板， 其中， 所述数层液晶盒 的层数为三层， 分别为第一至第三层液晶盒， 所述第一层液晶盒中的二色 性染料吸收红色波长的光， 所述第二层液晶盒中的二色性染料吸收绿色波 长的光， 所述第三层液晶盒中的二色性染料吸收蓝色波长的光。
1 1 . 一种彩色液晶显示面板， 包括： 相互平行设置的数层液晶盒及用 于粘接所述数层液晶盒的粘接固件， 每一所述液晶盒包括一薄膜晶体管基 板、 一封装基板及密封于所述薄膜晶体管基板与封装基板之间的染料液晶 层， 所述染料液晶层包括液晶材料、 二色性染料及手性试剂， 每一所述液 晶盒中的二色性染料吸收一预定波长范围的光， 所述数层液晶盒分别吸收 不同波长范围的光；
其中， 所述液晶材料为具有正性向列液晶材料； 所述粘接固件为光学 透明胶水或双面胶；
其中， 所述薄膜晶体管基板包括一第一透明基板、 形成于所述第一透 明基板上的数根櫥极线、 形成于所述第一透明基板上的数根数据线、 形成 于所述第一透明基板上的薄膜晶体管阵列、 形成于所述薄膜晶体管阵列上 的数个像素电极、 形成于所述像素电极及薄膜晶体管阵列上的第一平坦化 层及形成于所述第一平坦化层上的第一配向层；
其中， 所述第一透明基板为玻璃基板， 所述像素电极由氧化铟锡制 成， 所述第一配向层为水平配向层；
其中， 所述封装基板包括一第二透明基板、 形成于所述第二透明基板 上的黑色矩阵、 形成于所述第二透明基板及黑色矩阵上的第二平坦化层、 形成于所述第二平坦化层上的公共电极、 形成于所述公共电极上的第二配 向层及形成于所述第二配向层上的光阻材料层， 所述黑色矩阵、 *极线、 数据线及薄膜晶体管阵列相互配合将该彩色液晶显示面板划分为数个像 素；
其中， 所述第二透明基板为玻璃基板， 所述公共电极由氧化铟锡制 成， 所述第二配向层为水平配向层。
12、 如权利要求 11 所述的彩色液晶显示面板， 其中， 所述液晶材料 含有液晶分子， 所述第一配向层的配向方向与第二配向层的配向方向形成 一夹角， 以使液晶分子在没有驱动电压作用的情况下形成向列扭转排列结 构， 所述夹角大于 0° 且小于 180° ， 所述液晶分子的扭转角度大于或等 于 90。 ， 且小于 180° 。
13、 如权利要求 11 所述的彩色液晶显示面板， 其中， 所述液晶材料 含有液晶分子， 所述二色性染料含有二色性染料分子， 所述二色性染料分 子具有与所述液晶分子的分子结构相类似的分子结构； 所述二色性染料分 子对可见光线具有选择性吸收作用； 当可见光线行进方向与二色性染料分 子长轱平行时， 二色性染料分子对可见光线不具有吸收作用， 当可见光线 行进方向与二色性染料分子长轴垂直时， 二色性染料分子对可见光线具有 吸收作用。
14、 如权利要求 13 所述的彩色液晶显示面板, 其中， 当不施加驱动 电压于所述薄膜晶体管基板与封装基板时， 所述液晶分子与所述二色性染 料分子形成向列扭转排列结构， 所述液晶分子与二色性染料分子具有多方 向的扭转排列角度， 所述二色性染料分子对可见光线具有吸收作用； 当施 加驱动电压于所述薄膜晶体管基板与封装 板时， 所述液晶分子与所述二 色性染料分子旋转至垂直于所述薄膜晶体管基板或所述封装基板表面， 所 述二色性染料分子对可见光线不具有吸收作用。
15、 如权利要求 11 所述的彩色液晶显示面板， 其中， 所述数层液晶 盒的层数为三层， 分别为第一至第三层液晶盒， 所述第一层液晶盒中的二 色性染料吸收红色波长的光， 所述第二层液晶盒中的二色性染料吸收绿色 波长的光， 所述第三层液晶盒中的二色性染料吸收蓝色波长的光。
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